A demonstration of the new technology. Fujitsu's smartphones (upper) with the nonlinear signal processing method-based super-resolution technology turned on (right) and off (left). And other companies' phones (lower) for comparison. Video displayed using the super-resolution technology had the highest resolution with a significant difference.
[Click to enlarge image]

Kogakuin University announced that it has developed a super-resolution technology capable of playing video on a smartphone in real time.

It is a result of a joint research conducted by Seiichi Gohshi (professor of the Department of Information Design, the Faculty of Informatics, Kogakuin University) and Fujitsu Ltd. The new technology was employed for the "Xevic" image processing engine of Fujitsu's "arrows NX F-02H" smartphone, which will be released in late November 2015.

Unlike commonly-used "reconstructed super resolution" and "learning super resolution," the super-resolution technology being researched by Gohshi uses an original method called "nonlinear signal processing method."

"A nonlinear function is applied to the edges detected by applying a high-pass filter to input images," he said. "Then, the data is compressed and added to the original images."

Though it is similar to a conventional enhancer function, it is different in that a nonlinear function is used to supplement high-frequency components, Gohshi said. As a result, it becomes possible to reproduce images with high-resolution components that surpass the "Nyquist frequency (half of a sampling frequency)," which is the theoretical limit of super-resolution.

Also, the new method does not need repeated calculation, which is required for general super-resolution technologies, and uses a simple algorithm. So, it is suited for real-time processing.